SUDO_ASKPASS not working

DonPIZI

5/10/24, 9:00 AM

I would like to create a simple script to download and install a program over ssh.

#!/bin/bash
echo "Welcher Rechner?"
read nummer
echo "Verbinde zu APC "$nummer
apc=apc$nummer.local
sshpass -f .pass_file scp $HOME/autoconfig/.filius_update.sh dvadmin@$apc:$HOME/
sshpass -f .pass_file scp $HOME/autoconfig/filiusurl dvadmin@$apc:$HOME/
sshpass -f .pass_file scp $HOME/autoconfig/.pass_file.sh dvadmin@$apc:$HOME/.pass_file.sh
sshpass -f .pass_file ssh dvadmin@$apc 'export SUDO_ASKPASS=${HOME}/.pass_file.sh; sudo -A chmod +x ./.filius_update.sh && ./.filius_update.sh'
sshpass -f .pass_file ssh dvadmin@$apc 'export SUDO_ASKPASS=${HOME}/.pass_file.sh; sudo -A rm ./.pass_file.sh && rm filius.deb && rm filiusurl && rm .filius_update.sh'

But the terminal send me an error that I have to configure askpass:

sudo: a terminal is required to read the password; either use the -S option to read from standard input or configure an askpass helper
sudo: A password is required
sudo: a terminal is required to read the password; either use the -S option to read from standard input or configure an askpass helper
sudo: A password is required

I don't understand what did I wrong.

Thank you in advice.

146

1 + 2

ssh

bash

sudo

virtual-console

Raffa

5/10/24, 2:41 PM

You are running `sudo` in a remote shell without a terminal device ... As a security feature `sudo` requires the password to be intered/transmitted through a terminal/virtual terminal device ... See for example similar [sudo: unable to allocate pty: No such device](https://askubuntu.com/q/1449413) ... Also see the part about `sudo -S` here: https://askubuntu.com/a/1465841

Raffa

5/10/24, 3:03 PM

On the other hand, I'm not sure even `SUDO_ASKPASS` can work in a remote shell like that ... I haven't tested it to confirm, but in theory it shouldn't work that way(*at least not with available normal methods/mechanisms*) ... You most likely need to look into alternatives.

Score:0

Ubuntu

DonPIZI

5/24/24, 8:29 AM

now I use

sshpass -f .pass_file ssh dvadmin@$apc '$HOME/.pass_file.sh | sudo -S chmod +x ./.filius_update.sh && ./.filius_update.sh'

and it finally works :) I don't know why my old way doesn't work anymore but I've a solution and now I have to edit my other scripts :/

+ 0

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: SUDO_ASKPASS not working

Post an answer

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